systemvm/debian/etc/logrotate.d/dnsmasq

/var/log/dnsmasq.log {
    maxsize 10M
    missingok
    rotate 5
    notifempty
    compress
    delaycompress
    sharedscripts
    postrotate
        [ ! -f /var/run/dnsmasq/dnsmasq.pid ] || kill -USR2 `cat /var/run/dnsmasq/dnsmasq.pid`
    endscript
    create 0640 dnsmasq root
}